Whites Glacier Layering System: GLACIER JACKET: 18oz Yukon Fleece polypropylene body. Outer nylon shoulder covering. YKK zipper. Thumb loops. Front hand warming pockets. Adjustable elastic waist cinch. GLACIER JOHN: 18oz Yukon Fleece polypropylene body. Outer nylon shoulder covering. YKK zipper. Ankle stirrups. Hand warming pockets.